\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes}
\ctikzset{bipoles/length=1cm}
\begin{document}
\small
\begin{circuitikz}[>=latex, scale=1,european]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
\draw (0,1)--(0,.5)--(5,.5)--(5,2) ;
\draw  (3.5,2) to [lamp] (2,2)--(2,1)--(1,1);
\draw [american](3.5,2) to [cute choke, l=$L$] (5,2);

\draw (0,.2)--(0,-0.5); 
\draw (1,.2)--(1,-0.5);
\draw (0,1.8)--(0,2.5) node[above]{$-$}; 
\draw (1,1.8)--(1,2.5)node[above]{$+$};

\node at (-.5,1){$K$};
\draw [ultra thick](0,1)--(-.4,1.8);
\draw [ultra thick](1,1)--(1-.4,1.8);
\draw (-.2, 1.5)-- (-.2+1, 1.5);
\draw [very thick] (-.25, 1.5)-- (-.25+1, 1.5);
\draw [very thick] (-.3, 1.6)-- (-.3+1, 1.6);

\foreach \x in {0,1}
\foreach \y in {.2,-0.5,1,1.8,2.5}
{
\draw [fill=white](\x,\y) circle (1.5pt);
}
\node at (.5, -0.5){$\sim$};
\end{circuitikz}
\end{document}